Fix the CXX_INCLUDE_ROOT case that was out of date with ScanLibDirForGCCTriple.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@141980 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Driver/ToolChains.cpp b/lib/Driver/ToolChains.cpp
index 0fa25fb..273f4b4 100644
--- a/lib/Driver/ToolChains.cpp
+++ b/lib/Driver/ToolChains.cpp
@@ -1575,7 +1575,7 @@
       GccInstallPath.append(CXX_INCLUDE_ARCH);
       GccInstallPath.append("/");
       GccInstallPath.append(Version);
-      GccParentLibPath = GccInstallPath + "/../../../..";
+      GccParentLibPath = GccInstallPath + "/../../..";
       IsValid = true;
       return;
     }